WO2021243738A1 - 一种步进电机 - Google Patents

一种步进电机 Download PDF

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Publication number
WO2021243738A1
WO2021243738A1 PCT/CN2020/095053 CN2020095053W WO2021243738A1 WO 2021243738 A1 WO2021243738 A1 WO 2021243738A1 CN 2020095053 W CN2020095053 W CN 2020095053W WO 2021243738 A1 WO2021243738 A1 WO 2021243738A1
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WO
WIPO (PCT)
Prior art keywords
rotor
motor
coil
rotating shaft
voice coil
Prior art date
Application number
PCT/CN2020/095053
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English (en)
French (fr)
Inventor
张强
陈为博
赵彬
陈敏敏
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诚瑞光学(常州)股份有限公司
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Publication of WO2021243738A1 publication Critical patent/WO2021243738A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1275—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by applying heat
    • H02G1/128—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by applying heat using radiant energy, e.g. a laser beam
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof

Definitions

  • This application relates to the field of motor technology, and in particular to a stepping motor.
  • stepper motors Because of its compact structure, high power density, high work efficiency, and significant energy saving and consumption reduction benefits, stepper motors have been widely used in the fields of motors and generators. In recent years, the industrial field has more and more urgent demands for devices that use stepper motors to directly drive loads. The wide application of these stepper motors directly drive devices will produce immeasurable energy-saving benefits.
  • the micro stepping motor is connected with the reducer to provide input torque for the reducer. It is the drive source of the reducer module.
  • the electric signal is connected to the motor coil to realize the input of the electric signal, but because the coil is enameled wire, the outermost layer is an insulating layer , This insulating layer needs to be removed before it can be turned on.
  • the traditional method in the industry is to immerse the wire-containing wire column in a tin furnace or a method similar to screen printing to immerse the tin on the wire-containing wire column, and use high-temperature liquid tin to remove the insulating layer. Stepping motors made by existing processing methods have many defects: 1.
  • the temperature resistance level of the enameled wire should be low (otherwise the insulation layer cannot be removed), which results in a reduction in the temperature resistance level of the entire voice coil ,
  • the voice coil will be burnt out during the motor locked-rotor test; 2. High-temperature liquid tin will soften the winding column, causing burns, deformation and other defects; 3.
  • the processing efficiency is low, which is not conducive to mass production preparation.
  • the purpose of the present application is to provide a stepping motor in which the coil insulation layer on the winding voice coil winding column of the motor is removed by laser irradiation to solve the above-mentioned defects.
  • a stepper motor the stepper motor includes: a rotor and a plurality of stators arranged around the rotor;
  • the rotor includes a rotating shaft, a magnetic steel sleeved on the outside of the rotating shaft, and rotor magnetic poles ringed on the outer surface of the magnetic steel. Two magnetic strips;
  • a plurality of the stators are stacked axially along the rotating shaft and are sleeved outside the rotor at intervals.
  • the stator includes a cylindrical voice coil, which is arranged inside the voice coil close to the rotor and is connected to the rotor. Stator magnetic poles corresponding to the magnetic poles and coils wound on the outside of the voice coil away from the rotor;
  • the voice coil includes a cylindrical main body, the cylindrical main body is provided with two opposite ends in the axial direction; and a spool arranged at one of the ends;
  • the coil includes a coil body wound on the cylindrical body and a terminal wound on the winding post.
  • the coil includes a conductive core and an insulating layer sheathed outside the conductive core. The insulating layer is removed by laser irradiation.
  • the voice coil further includes a limiting platform extending from the edge of the end portion in a direction away from the rotating shaft in a radial direction.
  • the voice coil further includes a boss extending from an edge of one of the limit platforms away from the rotation axis in a radial direction, the boss is in the shape of a plate, and one end of the boss is far away from the limit platform.
  • Two winding posts extend radially away from the rotating shaft, and the two winding posts are arranged at intervals.
  • the wire-wound column is columnar and extends from the boss in a direction away from the rotating shaft.
  • the motor further includes a circuit board provided with an interface, and the winding post penetrates the interface so that the terminal is connected to the circuit board.
  • the stator magnetic pole includes two claw poles that are matched into a cylindrical shape and have opposite magnetic poles, and the claw poles include a ring-shaped part and a plurality of claw-shaped magnetic poles spaced apart from the ring-shaped part.
  • the shape of the magnetic pole is matched with the interval of the other claw pole.
  • the motor further includes a shell wall surrounding the voice coil, the shell wall has a cylindrical structure, and one end of the shell wall is connected to the ring-shaped part of the claw pole.
  • the motor further includes a cover provided at both ends of the shell wall, a receiving space between the shell wall and the cover is formed between the rotor and a plurality of the stators, and the cover includes a cover body And a bearing arranged in the cover body, the cover is annular, the bearing is arranged on the inner ring, and the rotating shaft is arranged on the bearing.
  • the rotor is further provided with two annular gaskets sleeved on the rotating shaft, which are respectively arranged between the two ends of the magnetic steel and the two bearings.
  • the magnetic steel is in a column shape, and the first magnetic strip and the second magnetic strip are in a strip shape, and respectively extend on the outer surface of the magnetic steel along the axis of the rotating shaft.
  • the beneficial effect of the present application is to provide a stepping motor, including a rotor and a plurality of stators arranged around the rotor, and a cylindrical voice coil is arranged in the stator to be wound around the coil outside the voice coil away from the rotor .
  • the voice coil includes a cylindrical body with two opposite ends in the axial direction; and a bobbin arranged at one of the ends; the coil includes a coil wound around the cylindrical body
  • the main body and the terminal wound on the winding post, the coil includes a conductive core and an insulating layer sheathed outside the conductive core, and the insulating layer of the terminal is removed by laser irradiation.
  • the temperature resistance level of the insulation layer of the coil can be improved, the temperature resistance level of the entire voice coil can be higher, and the reliability test such as locked rotor can be improved to improve the performance of the motor. At the same time, it also avoids the damage of the winding column caused by the traditional process, and improves the processing efficiency.
  • Figure 1 is a schematic diagram of a motor structure provided by an embodiment of the present application.
  • Figure 2 is an exploded schematic diagram of a motor structure provided by an embodiment of the present application.
  • Fig. 3 is a detailed structural diagram of the voice coil and the coil of Fig. 2 in an embodiment of the present application;
  • Fig. 4 is a schematic structural diagram of a voice coil and coil combination in an embodiment of the present application.
  • Fig. 5 is a schematic structural view of the voice coil and coil assembly of Fig. 4 viewed along the axial direction in the embodiment of the present application.
  • motor 100 rotor 1; rotating shaft 11; magnet 12; rotor pole 13; first magnetic strip 131; second magnetic strip 132; spacer 14; stator 2; voice coil 21; cylindrical body 211; end Part 212; winding post 213; limit platform 214; boss 215; coil 22; coil body 221; terminal 222; first claw pole 231; first ring portion 2311; first claw pole 2312; first Interval 2313; second claw pole 232; second annular portion 2321; second claw-shaped magnetic pole 2322; second interval 2323; housing 3; shell wall 33; cover 31; bearing 32; circuit board 4;
  • the stepping motor 100 includes a rotor 1 and a stator assembly surrounding the rotor 1.
  • the stator assembly includes a plurality of stators 2 arranged in the same manner. It is arranged to be stacked, and the interval is sleeved outside the rotor 1.
  • the rotor 1 includes a rotating shaft 11, a cylindrical magnet 12 sleeved on the outside of the rotating shaft 11, and a rotor magnetic pole 13 arranged on the outer surface of the magnet 12.
  • the rotor magnetic pole 13 includes a first magnetic strip 131 and a second magnetic strip 132 with opposite magnetic properties (for example, the first magnetic strip 131 is an N-pole, and the second magnetic strip 132 is an S-pole), a number of first magnetic strips 131 and a second magnetic strip.
  • the strips 132 are alternately arranged in a ring shape and sleeved on the outer surface of the columnar magnetic steel 12.
  • the first magnetic strip 131 and the second magnetic strip 132 are strip-shaped, and respectively extend on the outer surface of the magnetic steel 12 along the axis of the rotating shaft 11. Wherein, the number and thickness of the first magnetic strip 131 and the second magnetic strip 132 are the same, and the number can be set as required. Both the first magnetic strip 131 and the second magnetic strip 132 extend between the two ends of the magnetic steel 12 in a strip shape.
  • the stator 2 is also cylindrical. A number of stators 2 are stacked along the axis of the rotating shaft 11 and surround the rotor 1.
  • the stator 2 includes a cylindrical voice coil 21, which is arranged inside the voice coil 21 close to the rotor 1 and corresponding to the magnetic poles of the rotor 1 The stator poles and the coil 22 wound on the outside of the voice coil 21 away from the rotor 1.
  • the voice coil 21 includes a cylindrical main body 211 provided with two end portions 212 opposite in the axial direction, and a winding post 213 provided at one end portion 212, wherein the end portion 212 has a ring shape.
  • the voice coil 21 further includes a ring-shaped limiter 214, and the limiter 214 extends from the edge of the end 212 in a direction away from the rotating shaft 11 in the radial direction. It is formed to restrict the winding of the coil 22 on the outer surface of the cylindrical main body 211 between the two end portions 212.
  • the voice coil 21 further includes a boss 215 extending from the edge of one of the limiting platforms 214 away from the rotating shaft 11 in the radial direction, and the boss 215 is a plate.
  • Two winding posts 213 extend from one end of the boss 215 away from the limiting platform 214 away from the rotating shaft 11 in the radial direction, and the two winding posts 213 are arranged at intervals.
  • the boss 215 is in the shape of a square plate
  • the winding column 213 is in the shape of a column and extends in a direction away from the rotating shaft 11.
  • the coil 22 includes a coil body 221 wound on the cylindrical body 211 and a terminal 222 wound on the winding post 213, the coil 22 can be wound along the cylindrical body 211 until the limit stand
  • the cylindrical body 211 between the 214 is fully covered, and the two terminals 222 from the coil 22 are respectively wound on the two winding posts 213 to cover the first plane 2131, the second plane 2132, and the first plane of the winding post 213
  • the coil 22 is an enameled wire and includes a conductive core and an insulating layer wrapped around the conductive core.
  • the coil insulating layer of the terminal 222 is removed by laser irradiation.
  • a low-power laser is used to irradiate the terminal 222 to be removed, and the insulating layer of the enameled wire is removed with laser energy.
  • the laser irradiation can irradiate the enameled wire on the first plane 2131, the second plane 2132, the third plane, and the fourth plane.
  • the insulation layer of the terminal 222 of the winding post 213 of the voice coil 21 is removed by laser irradiation, which can improve the temperature resistance of the insulation layer of the coil 22 and make the entire voice coil 21 more resistant.
  • the temperature level is higher, and reliability tests such as locked-rotor are improved to improve the performance of the motor 100.
  • it also avoids damage to the winding column 213 caused by the traditional process (tin furnace or similar silk-screen printing), and improves the processing efficiency.
  • the motor 100 further includes a circuit board 4, the circuit board 4 is a flexible circuit board, and the circuit board 4 is provided with multiple rows of interfaces corresponding to a number of stators 2, each Each stator 2 corresponds to a row of ports, each row of two ports 41, the port 41 is connected to the positive and negative poles of the power supply, the two winding posts 213 of each stator 2 penetrate the port 41 so that the terminal 222 abuts the circuit board 4. The circuit is turned on, and the coil 22 generates current.
  • the stator magnetic pole 23 includes two first claw poles 231 and a second claw pole 232 that are matched into a cylindrical shape and have opposite magnetic poles (for example, the first claw pole 231 is an N pole, Then the second claw pole 232 is an S pole), and the first claw pole 231 and the second claw pole 232 have the same structure.
  • the first claw pole 231 includes a first ring portion 2311 and a plurality of first claw-shaped magnetic poles 2312 spaced apart from the first ring portion 2311, and the plurality of first claw-shaped magnetic poles 2312 are provided on the same surface of the first ring portion 2311 superior.
  • the second claw pole 232 includes a second ring portion 2321 and a plurality of second claw-shaped magnetic poles 2322 spaced apart from the second ring portion 2321, and the plurality of second claw-shaped magnetic poles 2322 are provided on the same surface of the second ring portion 2321 superior.
  • the spacing between the first claw pole 2312 of the first claw pole 231 and the second claw pole 232 is matched to form a cylindrical structure. It is sleeved outside the rotor 1 and opposite to the rotor magnetic pole 13.
  • the motor 100 further includes a shell wall 33 arranged around the voice coil 21.
  • the shell wall 33 has a cylindrical structure, wherein the shell wall 33 may be multiple with the stator 2
  • the connected shell wall 33 may be integrated with the stator 2, and one end of the shell wall 33 is connected to the ring part of one of the claw poles.
  • the motor 100 further includes a cover 31 provided at both ends of the housing wall 33.
  • the housing wall 33 and the cover 31 form a housing between the rotor 1 and the plurality of stators 2.
  • the cover 31 is annular
  • the inner ring is provided with a bearing 32
  • the rotating shaft 11 is provided on the bearing 32
  • the shell wall 33, the cover 31 and the bearing 32 are combined to form the housing 3.
  • the rotating shaft 11 of the rotor 1 is further provided with a gasket 14.
  • gaskets 14 which are respectively provided between the two ends of the magnetic steel 12 and the bearing 32.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

一种步进电机（100），包括转子（1）以及环绕所述转子（1）设置的若干定子（2），定子（2）内设置呈筒状的音圈（21）以及缠绕于背离所述转子（1）的所述音圈（21）外侧的线圈（22）。所述音圈（21）包括筒状主体（211），所述筒状主体（211）具有沿轴向相对设有两个端部（212）以及设于其中一个端部的缠线柱（213）；所述线圈（22）包括缠绕于所述筒状主体（211）的线圈主体（221）和缠绕于所述缠线柱（213）上的接线端（222），所述线圈（22）包括导电芯和套设在所述导电芯外的绝缘层，所述接线端（222）的绝缘层采用激光照射去除。通过以上方式，可提高线圈的绝缘层耐温等级，使整个音圈的耐温等级更高，改善堵转等可靠性试验，以提升电机性能。同时也避免了传统工艺造成缠线柱损伤，提高了加工效率。

Description

一种步进电机 技术领域
本申请涉及电机技术领域，尤其涉及一种步进电机。
 背景技术
步进电机由于结构紧凑，功率密度高、工作效率高、节能降耗效益显著，在电动机和发电机等领域得到了广泛的应用。近年来，工业领域对利用步进电机直接驱动负载工作的设备的需求越来越迫切，这些步进电机直驱设备的广泛应用，将产生不可估量的节能效益。
微型步进电机与减速器连接，为减速器提供输入力矩，是减速器模组驱动源，电信号通过与电机的线圈连接实现电信号的输入，但是由于线圈是漆包线，最外层是绝缘层，需要将此绝缘层去除，才能导通。目前业内的传统方法是将含线的缠线柱浸入锡炉或者类似丝印印刷的方式将锡浸在含线缠线柱上，用高温液体锡将绝缘层去除的方式加工的。应用现有加工方法制得的步进电机存在多种缺陷：1、若要完全去除漆包线，漆包线的耐温等级要低（否者绝缘层无法去除），而导致整个音圈的耐温等级降低，电机堵转试验时，烧坏音圈；2、高温液体锡会软化缠线柱，导致缠线柱烫伤、变形等缺陷；3、加工效率低，不利于批量化生产制备。
因此，有必要提供一种新的步进电机来改善上述问题。
 技术问题
本申请的目的在于提供一种步进电机，该电机的缠绕音圈缠线柱上的线圈绝缘层通过激光照射去除，以解决上述缺陷。
 技术解决方案
本申请的技术方案如下：一种步进电机，所述步进电机包括：转子以及环绕所述转子设置的若干定子；
所述转子包括转轴、套设于所述转轴外的磁钢以及环设于所述磁钢外表面的转子磁极，所述转子磁极包括磁极相反且交错围设成环的第一磁条和第二磁条；
若干所述定子沿所述转轴轴向叠设且间隔套设于所述转子外，所述定子包括呈筒状的音圈、设于靠近所述转子的所述音圈内侧且与所述转子磁极对应设置的定子磁极以及缠绕于背离所述转子的所述音圈外侧的线圈；
所述音圈包括筒状主体，所述筒状主体沿轴向相对设有两个端部；以及设于其中一个端部的缠线柱；
所述线圈包括缠绕于所述筒状主体的线圈主体和缠绕于所述缠线柱上的接线端，所述线圈包括导电芯和套设在所述导电芯外的绝缘层，所述接线端的绝缘层采用激光照射去除。
优选的，所述音圈还包括从所述端部的边缘沿径向背离所述转轴方向延伸的限位台。
优选的，所述音圈还包括从其中一个限位台的边缘沿径向背离所述转轴方向延伸的凸台，所述凸台呈板状，所述凸台远离所述限位台一端沿着径向背离所述转轴方向延伸出两个所述缠线柱，两个所述缠线柱间隔设置。
优选的，所述缠线柱呈柱状，从所述凸台向背离所述转轴方向延伸。
优选的，所述电机还包括设有接口的电路板，所述缠线柱贯穿所述接口使得所述接线端与所述电路板相接。
优选的，所述定子磁极包括两个配合成筒状且磁极相反的爪极，所述爪极包括环状部和间隔设于所述环状部的若干爪状磁极，其中一个爪极的爪状磁极与另一个爪极的间隔配合。
优选的，所述电机还包括环设于所述音圈外的壳壁，所述壳壁呈筒状结构，所述壳壁的一端和所述爪极的环状部相连。
优选的，所述电机还包括设于所述壳壁两端的盖子，所述壳壁和所述盖子之间形成收容所述转子和若干所述定子之间的收容空间，所述盖子包括盖体和设于所述盖体内的轴承，所述盖子呈环形，所述轴承设于内环上，所述转轴设于所述轴承上。
优选的，所述转子还设有套设在所述转轴上的两个环形垫片，分别设于磁钢的两端和两个所述轴承之间。
优选的，所述磁钢呈柱状，所述第一磁条和所述第二磁条呈条状，分别沿所述转轴轴向在所述磁钢外表面延伸。
 有益效果
本申请的有益效果在于：提供了一种步进电机，包括转子以及环绕所述转子设置的若干定子，定子内设置呈筒状的音圈缠绕于背离所述转子的所述音圈外侧的线圈。所述音圈包括筒状主体，所述筒状主体沿轴向相对设有两个端部；以及设于其中一个端部的缠线柱；所述线圈包括缠绕于所述筒状主体的线圈主体和缠绕于所述缠线柱上的接线端，所述线圈包括导电芯和套设在所述导电芯外的绝缘层，所述接线端的绝缘层采用激光照射去除。通过以上方式，可提高线圈的绝缘层耐温等级，使整个音圈的耐温等级更高，改善堵转等可靠性试验，以提升电机性能。同时也避免了传统工艺造成缠线柱损伤，提高了加工的效率。
 附图说明
图1是本申请实施例提供的电机结构示意图；
图2是本申请实施例提供的电机结构爆炸示意图；
图3是本申请实施例中图2的音圈和线圈细节结构示意图；
图4是本申请实施例中的音圈和线圈组合的结构示意图；
图5是本申请本申请实施例中图4音圈和线圈组合沿轴向看的结构示意图。
附图标记：电机100；转子1；转轴11；磁钢12；转子磁极13；第一磁条131；第二磁条132；垫片14；定子2；音圈21；筒状主体211；端部212；缠线柱213；限位台214；凸台215；线圈22；线圈主体221；接线端222；第一爪极231；第一环状部2311；第一爪状磁极2312；第一间隔2313；第二爪极232；第二环状部2321；第二爪状磁极2322；第二间隔2323；外壳3；壳壁33；盖子31；轴承32；电路板4；接口41。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”和“第三”等是用于区别不同对象，而非用于描述特定顺序。此外，术语“包括”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
本申请实施例中所有方向性指示(诸如上、下、左、右、前、后、内、外、顶部、底部……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。当元件被称为“固定于”或“设置于”另一个元件上时，该元件可以直接在另一个元件上或者可能同时存在居中元件。当一个元件被称为“连接”另一个元件，它可以是直接连接另一个元件或者可能同时存在居中元件。
本申请提供了一种步进电机100，请参阅图1-图2，步进电机100包括：转子1和环绕转子1的定子组件，定子组件包括若干相同设置的定子2，若干定子2沿轴向堆叠设置，间隔套设于转子1外。
转子1包括转轴11、套设于转轴11外的呈筒状的磁钢12以及设于磁钢12外表面的转子磁极13。转子磁极13包括磁性相反的第一磁条131和第二磁条132（例如第一磁条131为N极，则第二磁条132为S极），若干第一磁条131和第二磁条132交错围设成环状，套设在柱状的磁钢12的外表面。第一磁条131和所述第二磁条132呈条状，分别沿所述转轴11轴向在所述磁钢12外表面延伸。其中，第一磁条131和第二磁条132的个数与厚度相同且可以根据需要设置个数。第一磁条131和第二磁条132均呈条状在磁钢12的两端之间延伸。定子2也呈筒状，若干定子2沿转轴11轴向叠设且环绕转子1，定子2包括呈筒状的音圈21、设于靠近转子1的音圈21内侧且与转子1磁极对应设置的定子磁极以及缠绕于背离转子1的音圈21外侧的线圈22。
请参阅图2-图5，音圈21包括沿轴向相对设有两个端部212的筒状主体211以及设于其中一个端部212的缠线柱213，其中，端部212呈环形。
在一个可选的实施方式中，请参阅图2-图5，音圈21还包括呈环状的限位台214，限位台214从端部212的边缘沿着径向背离转轴11方向延伸形成，用于限制线圈22缠绕在两个端部212之间的筒状主体211外表面。
在一个可选的实施方式中，请参阅图2-图5，音圈21还包括从其中一个限位台214的边缘沿着径向背离转轴11方向延伸的凸台215，凸台215呈板状，凸台215远离限位台214一端沿着径向背离转轴11方向延伸出两个缠线柱213，两个缠线柱213间隔设置。这里凸台215设为方形板状，缠线柱213为柱状，沿远离转轴11方向延伸。
请参阅图2-图5，线圈22包括缠绕于筒状主体211的线圈主体221和缠绕于缠线柱213上的接线端222，线圈22可以沿着筒状主体211缠绕直至将的限位台214之间的筒状主体211全覆盖，线圈22引出的两个接线端222分别缠绕至两个缠线柱213上覆盖缠线柱213的第一平面2131、第二平面2132、与第一平面2131相对的第三平面（图未示）以及与第二平面2132相对的第四平面（图未示）。线圈22为漆包线，包括导电芯和包裹在导电芯外的绝缘层，接线端222的线圈绝缘层采用激光照射去除。采用低功率激光照射在需要去除的接线端222，用激光能量将漆包线的绝缘层去除，激光照射可以照射到第一平面2131、第二平面2132、第三平面以及与第四平面上的漆包线。
本申请的步进电机100，通过激光照射去除设线圈22在音圈21的缠线柱213的接线端222的绝缘层，可提高线圈22的绝缘层耐温等级，使整个音圈21的耐温等级更高，改善堵转等可靠性试验，以提升电机100性能。同时也避免了传统工艺（锡炉或者类似丝印印刷的方式）造成缠线柱213损伤，提高了加工的效率。
在一个可选的实施方式中，请参阅图1和图2，电机100还包括电路板4，电路板4为柔性电路板，电路板4上设有与若干定子2对应的多排接口，每个定子2对应一排接口，每排两个接口41，接口41与电源的正负极相连，每个定子2的两个缠线柱213贯穿接口41使得接线端222与电路板4抵接，电路导通，线圈22产生电流。
在一个可选的实施方式中，请参阅图2，定子磁极23包括两个配合成筒状且磁极相反的第一爪极231和第二爪极232（例如第一爪极231为N极，则第二爪极232为S极），第一爪极231和第二爪极232结构相同。第一爪极231包括第一环状部2311和间隔设于第一环状部2311的若干第一爪状磁极2312，若干第一爪状磁极2312设于第一环状部2311的同一个面上。第二爪极232包括第二环状部2321和间隔设于第二环状部2321的若干第二爪状磁极2322，若干第二爪状磁极2322设于第二环状部2321的同一个面上。通过第一爪极231的第一爪状磁极2312与第二爪极232的间隔配合，第二爪极232的第二爪状磁极2322与第一爪极231的间隔配合形成筒状结构，隔套设于转子1外，与转子磁极13相对。
在一个可选的实施方式中，请参阅图2，电机100还包括环设于音圈21外的壳壁33，壳壁33呈筒状结构，其中，壳壁33可以为多个与定子2连接的壳壁33，可以与定子2一体化，壳壁33的一端和其中的一个爪极的环状部相连。
在一个可选的实施方式中，请参阅1和图2，电机100还包括设于壳壁33两端的盖子31，壳壁33和盖子31之间形成收容转子1和若干定子2之间的收容空间，盖子31呈环形，内环上设有轴承32，转轴11设于轴承32上，壳壁33、盖子31和轴承32组合成外壳3。
在一个可选的实施方式中，请参阅图2，转子1的转轴11上还套设有垫片14，垫片14有两个，分别设于磁钢12的两端和轴承32之间。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

1. 一种步进电机，其特征在于，所述步进电机包括：转子以及环绕所述转子设置的若干定子；
所述转子包括转轴、套设于所述转轴外的磁钢以及环设于所述磁钢外表面的转子磁极，所述转子磁极包括磁极相反且交错围设成环的第一磁条和第二磁条；
若干所述定子沿所述转轴轴向叠设且间隔套设于所述转子外，所述定子包括呈筒状的音圈、设于靠近所述转子的所述音圈内侧且与所述转子磁极对应设置的定子磁极以及缠绕于背离所述转子的所述音圈外侧的线圈；
所述音圈包括筒状主体，所述筒状主体沿轴向相对设有两个端部；以及设于其中一个端部的缠线柱；
所述线圈包括缠绕于所述筒状主体的线圈主体和缠绕于所述缠线柱上的接线端，所述线圈包括导电芯和套设在所述导电芯外的绝缘层，所述接线端的绝缘层采用激光照射去除。
2.如权利要求1所述的电机，其特征在于，所述音圈还包括从所述端部的边缘沿径向背离所述转轴方向延伸的限位台。
3.如权利要求2所述的电机，其特征在于，所述音圈还包括从其中一个限位台的边缘沿径向背离所述转轴方向延伸的凸台，所述凸台呈板状，所述凸台远离所述限位台一端沿着径向背离所述转轴方向延伸出两个所述缠线柱，两个所述缠线柱间隔设置。
4.如权利要求3所述的电机，其特征在于，所述缠线柱呈柱状，从所述凸台向背离所述转轴方向延伸。
5.如权利要求1所述的电机，其特征在于，所述电机还包括设有接口的电路板，所述缠线柱贯穿所述接口使得所述接线端与所述电路板相接。
6.如权利要求1所述的电机，其特征在于，所述定子磁极包括两个配合成筒状且磁极相反的爪极，所述爪极包括环状部和间隔设于所述环状部的若干爪状磁极，其中一个爪极的爪状磁极与另一个爪极的间隔配合。
7.如权利要求1所述的电机，其特征在于，所述电机还包括环设于所述音圈外的壳壁，所述壳壁呈筒状结构，所述壳壁的一端和所述爪极的环状部相连。
8.如权利要求7所述的电机，其特征在于，所述电机还包括设于所述壳壁两端的盖子，所述壳壁和所述盖子之间形成收容所述转子和若干所述定子之间的收容空间，所述盖子包括盖体和设于所述盖体内的轴承，所述盖子呈环形，所述轴承设于内环上，所述转轴设于所述轴承上。
9.如权利要求8所述的电机，其特征在于，所述转子还设有套设在所述转轴上的两个环形垫片，分别设于磁钢的两端和两个所述轴承之间。
10.如权利要求1所述的电机，其特征在于，所述磁钢呈柱状，所述第一磁条和所述第二磁条呈条状，分别沿所述转轴轴向在所述磁钢外表面延伸。
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